Published by:
CGP EDU Academic Team
Published on: September 12, 2026
In A.C. circuit, cos θ is ..........
Text Solution
Verified by ExpertsThe correct answer is:
A
Step 1: Understand the context. In an alternating current (A.C.) circuit, the angle θ refers to the phase difference between the current and voltage.
Step 2: The cosine of this angle, cos θ, is known as the power factor (PF) of the circuit.
Step 3: Define the power factor:
Therefore, cos θ is a measure of how effectively electrical power is being converted into useful work in an A.C. circuit.
Step 2: The cosine of this angle, cos θ, is known as the power factor (PF) of the circuit.
Step 3: Define the power factor:
- If cos θ = 1, the circuit is purely resistive, and all the power is used effectively.
- If cos θ < 1, the circuit has reactance (inductive or capacitive), resulting in some power being reactive and not used effectively.
Therefore, cos θ is a measure of how effectively electrical power is being converted into useful work in an A.C. circuit.
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